/**
  * Deletes product filter from category
  *
  * @param integer $id
  * @return mixed
  * @throws ForbiddenHttpException
  */
 public function actionDeleteFilter($id)
 {
     if (!empty($id)) {
         $filter = Filter::findOne($id);
         $filter->delete();
     }
     return $this->redirect(Yii::$app->request->referrer);
 }